【摘要】：目的:探討Er,Cr:YSGG激光照射能量與牙體硬組織抗酸性之間的關(guān)系。方法:采用2.5、3.5、5 W激光照射牙釉質(zhì)樣本,2、3、4 W激光照射牙本質(zhì)樣本。經(jīng)0.1 mmol/L乳酸液浸泡24 h后檢測(cè)鈣磷溶出量,能譜儀檢測(cè)樣本表面鈣磷原子百分比,SEM觀(guān)察表面形態(tài)。結(jié)果:除2.5 W牙釉質(zhì)組,其余牙釉質(zhì)和牙本質(zhì)實(shí)驗(yàn)組鈣磷溶出量顯著低于對(duì)照組(P0.05),實(shí)驗(yàn)組間無(wú)明顯差異。激光照射后牙釉質(zhì)鈣磷比增加,牙本質(zhì)鈣磷含量均無(wú)變化。SEM觀(guān)察顯示實(shí)驗(yàn)組樣本表面粗糙,釉柱間隙增大,牙本質(zhì)小管口周牙本管突出成袖口狀。結(jié)論:一定能量的Er,Cr:YSGG激光照射可使牙硬組織抗酸性提高。
[Abstract]:Objective: to study the relationship between the energy of Ernst Cr: YSGG laser irradiation and the acid resistance of hard tissue. Methods: enamel samples were irradiated with 2.5 ~ 3.5W laser for 3 ~ 4 W laser irradiation on dentin samples. After being immersed in 0.1 mmol / L lactic acid solution for 24 hours, the dissolution of calcium and phosphorus was detected, and the surface morphology was observed by SEM and the percentage of calcium and phosphorus atoms on the surface of the sample was measured by energy spectrometer. Results: with the exception of 2.5 W enamel group, the dissolving amount of calcium and phosphorus in the experimental group was significantly lower than that in the control group (P0.05), but there was no significant difference between the two groups. After laser irradiation, the ratio of calcium to phosphorus in enamel increased, and the content of calcium and phosphorus in dentin did not change. SEM observation showed that the surface of the sample in the experimental group was rough, the gap of enamel post was enlarged, and the perioral dentine tubules protruded into cuff shape. Conclusion: Ernst Cr: YSGG laser irradiation with certain energy can improve the acid resistance of dental hard tissue.
【作者單位】： 首都醫(yī)科大學(xué)口腔醫(yī)學(xué)院牙體牙髓科;重慶醫(yī)科大學(xué)附屬口腔醫(yī)院;
【基金】：國(guó)家自然科學(xué)基金(編號(hào):81400515)
【分類(lèi)號(hào)】：R781.05

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本文編號(hào)：2119858